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    초록·키워드

    The fluctuations in amplitude and phase of the optical signal through the atmosphere occur due to the turbulence. This fading often results in unacceptably large bit error rate and thus performance degradation of wireless optical communications. One obvious way to improve the reliability of this type of communication system is through the use of error-correcting codes. In this paper, the equipment of measuring the turbulence strength and the IM/DD communication transmitter and receiver are made to measure the performance of the wireless optical communications through the turbulent atmosphere. The results of the measurements presented here indicate that the use of (2, 1, 6) convolutional code and hard-decision Viterbi decoding can yield 1 ~ 2 [dB] coding gain in turbulent atmosphere giving rise to bit error rate of 10^-3 ~ 10^-4.

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      UCI(KEPA) : I410-ECN-0101-2009-569-013238010